The aim of this study was to evaluate the efficacy of the Intubating Laryngeal Mask Airway (TM) (ILMA) and Laryngeal Mask Airway CTrach (TM) (LMA CTrach) in facilitating tracheal intubation in morbidly obese patients. Eighty patients (body mass index > 40kg.m-2) were randomly allocated to the ILMA or the LMA CTrach. The median (IQR [range]) total time taken for tracheal intubation was shorter with the ILMA than with the LMA CTrach (78 (63105 ) s vs 128 (98221 ) s, respectively; p < 0.001). Significantly more manoeuvres were applied for the satisfactory ventilation and viewing of the glottis with the LMA CTrach (25% vs 55% with the ILMA; p = 0.006). During the postoperative period, there was more sore throat with the LMA CTrach (p < 0.02). We conclude that the ILMA results in shorter intubation times with fewer manoeuvres and sore throat compared with the LMA CTrach in the morbidly obese.